$A$: Yellow bone marrow is reserve erythropoietic tissue.
$R$: After severe bleeding,yellow marrow may convert to red marrow.

  • A
    Assertion and Reason both are correct and Reason is the correct explanation of Assertion.
  • B
    Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.
  • C
    Assertion is correct,but Reason is incorrect.
  • D
    Both Assertion and Reason are incorrect.

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